Time-conditioned NeRF and NSFF [1]}.
Another way to handle non-rigid scenes is to directly map space-time to the output color and density by a time-conditioned latent vector \(\mathbf {\varphi }_t\) , which we refer to as T-NeRF:
\(F_t:(\mathbf {x}, \mathbf {\varphi }_t)\mapsto (\mathbf {c}, \sigma ).\) 
